Makefile: Add toolchain version check

This is an initial check for the coreboot toolchain versions.  It
currently checks binutils, gcc, clang, and iasl.  The other components
are slightly more difficult to test, but should follow on shortly.

If the toolchain is not the correct version, make will halt with
an error.

Change-Id: I41daf6c4545c01dc21231d78fd081bbcf77c4726
Signed-off-by: Martin Roth <>
Reviewed-by: Timothy Pearson <>
Tested-by: build bot (Jenkins)
2 files changed